Expansible post binder



Feb. 23; 1932; E. F. BUENGER 1,846,788

EXPANSIBLE POST BINDER Filed Nov a, 192s 2 sheets-sheet 1 El EEA@ Feb. '28, 1932. E. F. BUNGER- 1,846,788

EXPANSIBLE POST BINDER Filed Nov 8, 1928 2 shuts-Sheet 2 Aso `Patented Feb. 23, 19132 Y d' unir QFCHICAGQlLLINOI-S, A CORPORATION' OF MASSILCHUSETTS Y i.' f

EXPANsIBLn ros'r BINDER- Apliki'cauoa med-november s', 192s. se'riaiino. 317,339.

Y This inventionrelates to angexpansiblepost binder and concerns itself primarilyl'with sectional posts which `can .be simultaneously extended a predeterminedextentby meanso a rotatable elementand which can be further Y extended by the addition of post sections.

The invention comprises the novel structure and combinations of parts hereinafter described and more particularly pointed out wand defined in the appended claims.

In the,accompanyingdrawings, which illustrate apreferr'ed embodiment 'of this invention and in which similar reference numerals refer to similar features in the di'erent views: I

Figure 1 is a top plan view of a loose leaf vbinder involving this invention..

Figure 2 is an end elevational vie binder. Y -v Figure 3 is an enlarged sectional view taken upon the line III-III of Figure 1.

` Figure 4 is an enlarged view Jfrom below of;

the lower clamping member with'the cover plate removed.

which is taken longitudinally through clamping members of the binder.

Figure 6 is a top plan view of the binderV with the upper cover member and its clampingmember removed.

Figure 7 is an enlarged fragmentary sectional view through an impaling post illustrating the manner of adding additional posty sections.

i Figure 8 is a sectional view taken upon'the line WIL-VIII of Figure 5. Y

The binder to which this invention; is applied consists of a lowerclamping member 1 and an upper clamping member 2 which is made of sheet-metal in hollow box-like form. Cover members 3 are'hinged to the clamping members 1 and 2 as is usual in the art.

The lower clamping member consists of a plate and a channel-like member 1a which is secured to said plate-member by screws 4. Within the clamping member 1 are U-shaped brackets 5 which are provided with upper attaching lia-nges 6 secured to the plate 1. These U-shaped brackets are provided with cylindrical bearings 7 shown in Figure of the.

2 Figure 5 is an' enlarged sectional view the with the worms 10 Von thescrews `9.

vthey are shownintheir most contracte c"l.poV

,vided with threadedsockets 22|, at their np- 4ifor receiving a shafts, oneend of which extends thronghthe Vend'of the clamping l` member. V'Ihe projecting endfoi the'shaft '8,V

which is indicatedas 8o is ofpolygonal'form. *l 7 v for the purposeof receiving a key or wrench. V

-. A pair ofscrews 9 are rotatably secured in theclamping member r1. The lower portions of these screws arepenlarged.V Theenlarged portion` of each screw has a worm10 fixed thereon.4 kThe lowerend of eachscrew'has a reduced journal portion 11 which extends into an aperture or socket 12in the bottom of the LJ-shaped bracket 5.` 'Just above the enlarged bottomof the screws 9 there is a smooth porti'onl. Asleefve 14 vconcentric with each screw .9 lis fixed in the plate 1 against rotation. Impaling posts 15 are provided with lower reduced` portions 16 which 'fit into thelsleeye members 14, and these impaling `postsI are internally threaded orjreceivingthe screws A9. This reducedportion 16 is provided with a groove 17 which is best shown'in VFigure And-the sleeve 14 is provided with 'an in.- wardly directedbead 18V that lits into saidl groove. The aforementionedrod 8 isprovid-V 75 Y l 4in the bottom of the sleeves 14 so there is nof tendency torotate the sleeves. Onthe other hand',A thesleeve members 14 on account of their engagementy of thev beads 18 in` the. grooves 17,\prevent the yposts 15 from rotating, with the result that when the screws 9- are rotated the-V posts lzare compelled 'tou 90 Y `move longitudinally of `the screws. 9. The

Y posts 15 can also be retracted from" aneX- panded position forthe purpose of contracting the binder. In thefdrawings, however,

sition.

The Vpostslihave threaded sockets 520 in theirupper ends for receivingthe threaded stems cip-ost sections 21' whichare also piro-..

per ends for receiving screws 23 which clamp the upper clamping member 2 upon the posts. In this connection it will be noted that the upper. clamping member 2 is indented for re- 5 ceiving the heads of the screws 23 in order that the same will not project above the surface of the clamping member. It willl also be noted that the lower part ofthe upper clamping member is provided with suitable 10.. @apertures forreceiving theposts i Y In referring to Figure 7, it will 'be noted that a second post section 24 has been added to the post shown in Figure 5 and the-screw 23 1.

secures the upper clamping member to the post section 24 in a `mannersimilar tothat fshowninfFigure 5. `Incother words, Figure ..7 :illustrates theaddition ofigpost sections to y increasethe capacityof the binder beyond the Qshown in the i first form.

v be inserted or removed 'fromthe postswith- ,outremoving the upper cover. To this end 251 the apertures in thesheets that receive the .j posts are provided with slots'26 extending'. to

j'fwfinthe binder `whenfthe binder isfilled with Lleaves Vto an extent that requires some conrtraction. In the old sectional posts 1t was 1m- ,possible to contractth'e binder head to tighty :.lyembracethefleaves under any conditions.

'.I- ,am;aware:thatfmany Vchanges may be ;made and numerous vdetails y of construction extent .allowed byl the adjustable .posts "151 tIhe leaves which are illustrated at 25 may Illinois.

tations for securing said second clamping member to said posts.

3. In a loose leaf binder, a clamping member, a pair of sleevesl secured to said clamping member, a screw'eXtending into each sleeverfrom said clamping member, a post reciprocal ineach sleeve and in threaded relation with the screw therein, cooperative means between each sleeve and post for prejzventingvrelative `rotation `ithereof and. vmeans for simultaneously rotating-said screws for the purpose set forth.

f4. .Ina4loose leaf binder, a hollow clamping member, a plurality of brackets posi- Atimed-in said member, a rotatable shaft sup- ;ported by said brackets, gears carried bysaid shaft an'dpostioned inv said brackets in such amanner as t0 prevent lateral movement therewith, a plurality of screws extending into said clamping member and having their endportions disposed in'said brackets, each ofsaid screws having al gear in mesh Vwith onel of the aforementioned gears,apost earried byeach screw, and meansfor confining said posts for.v reciprocating .movement by saidscrews. A' p Y,

5.In alooseleaf binder, a plurality of clampingmembera alpluralityof sleeves secured to one of said members, a plurality of sectional posts secured to another of.' said members and slidably disposed'in :said

sleeves, rotatable members extending into said sleeves and having their upperends threadeidly connected to said posts, and means for actuating said rotatable members for slideably moving said posts in said sleeves. In testimony'whereo'f I have `hereunto* sub,- scribed myzname at Chicago, Cook County,

EDWARD F. BUENGER.

maybe variedthrough a wide range with- ,.out: departingfrem the, principles of' this inventionandI, therefore, do not purpose limni-iiting the patent granted hereon, otherwiseY than .necessitated by I the prior fart."

I-z claim ,as Amy invention y ,-1. ,Inla loose leaf binder, ahollowy clamp'- fling head, a pairof sleevesy secured to said i ahead,-.aprost slidably mountedin each sleeve,

g said posts ,and sleeves each having interen- ,1 aging partsfori preventing. relative rotation --.thereof, :a :screwfextending :into each-post :andfmea'nsV in f. the "hollow clamping member :for':rotating said=screws for causing rela.-

3tive sliding movement betweensaid-posts and l fsleeves.

V52.*In-a-loose leaf binder, a clamping-mem- UV "ber, 'a pairfof-posts extending from said clamping-member, a second clamping mem- V, berhaving apertures for receiving said posts, ,-said second clamping' member" providedV with `indentations for resting on top of said posts and screws havlng their heads vin said indeni 

